Unix / Linux: Maximum Character Length of Arguments In a Shell Command

The maximum length of arguments in a shell command is dependent on the underlying operating system and the system’s configuration. In most cases, the maximum length of arguments in a shell command is determined by the operating system’s shell and the maximum size of a command line buffer.

In most Unix-like systems, the maximum length of a command line buffer is defined by the ARG_MAX constant, which can be determined by using the getconf command:

 
getconf ARG_MAX

This will return the maximum length of arguments and environment variables for a single command, in bytes.

For example, on a typical Linux system, the value of ARG_MAX is usually around 262144 bytes, which translates to a maximum length of command line arguments of around 255 KB.

However, this value can vary between different operating systems and configurations, so it’s best to check the ARG_MAX value on the specific system you are working with to determine the maximum length of arguments in a shell command.

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